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Updated: Oct 1, 2025

Author Spotlight: Unveiling Mitochondrial Function and Cellular Metabolic Adaptation in Metabolic Diseases
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Author Spotlight: Unveiling Mitochondrial Function and Cellular Metabolic Adaptation in Metabolic Diseases

Published on: October 4, 2024

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TARGETED DOWN REGULATION OF CORE MITOCHONDRIAL GENES DURING SARS-COV-2 INFECTION

Joseph W Guarnieri1,2, Joseph M Dybas1,2, Hossein Fazelinia1,2

  • 1The Children's Hospital of Philadelphia, Philadelphia, PA 19104 USA.

Biorxiv : the Preprint Server for Biology
|March 2, 2022
PubMed

Insights

COVID-19 disrupts mitochondrial oxidative phosphorylation (OXPHOS) differently across organs. Enhancing mitochondrial gene expression may help mitigate disease by countering viral repression of OXPHOS functions.

Area of Science:

  • Biochemistry
  • Immunology
  • Virology

Background:

  • Mitochondrial oxidative phosphorylation (OXPHOS) defects are implicated in COVID-19, but their temporal and organ-specific dynamics remain unclear.
  • Understanding these dynamics is crucial for developing targeted therapies against SARS-CoV-2 infection.

Approach:

  • Analyzed transcription profiles from nasopharyngeal and autopsy samples of COVID-19 patients and infected rodent models.
  • Investigated the interplay between viral activity and host mitochondrial responses across different tissues and disease stages.

Key Points:

  • Mitochondrial bioenergetics are repressed in the nasopharynx but upregulated in autopsy lung tissues.
  • SARS-CoV-2 blocks discrete OXPHOS functions, which the host attempts to counteract by upregulating unblocked functions.
  • Autopsy heart samples show severe OXPHOS gene repression without host rebound, indicating critical cardiac impact.

Conclusions:

  • COVID-19 exhibits complex, organ-specific effects on mitochondrial OXPHOS.
  • Targeted enhancement of mitochondrial gene expression presents a potential therapeutic strategy to mitigate COVID-19 pathogenesis.

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